Abstract Number:
2722
Submission Type:
Contributed Abstract
Contributed Abstract Type:
Paper
Participants:
Yan Song (1), Zubair Khalid (2), Marc Genton (1)
Institutions:
(1) King Abdullah University of Science and Technology, N/A, (2) School of Science and Engineering, Lahore University of Management Sciences, Pakistan
Co-Author(s):
Zubair Khalid
School of Science and Engineering, Lahore University of Management Sciences
Marc Genton
King Abdullah University of Science and Technology
First Author:
Yan Song
King Abdullah University of Science and Technology
Presenting Author:
Abstract Text:
Earth system models (ESMs) are fundamental for understanding Earth's complex climate system. However, the computational demands and storage requirements of ESM simulations limit their utility. For the newly published CESM2-LENS2 data, which suffer from this issue, we propose a novel stochastic generator (SG) as a practical complement to the CESM2, capable of rapidly producing emulations closely mirroring training simulations. Our SG leverages the spherical harmonic transformation to shift from spatial to spectral domains, enabling efficient low-rank approximations that significantly reduce computational and storage costs. By accounting for axial symmetry and retaining distinct ranks for land and ocean regions, our SG captures intricate non-stationary spatial dependencies. Additionally, a modified Tukey g-and-h transformation accommodates non-Gaussianity in high-temporal-resolution data. We apply the proposed SG to generate emulations for surface temperature simulations from the CESM2-LENS2 data across various scales, marking the first attempt of reproducing daily data. These emulations are then meticulously validated against training simulations.
Keywords:
Emulator|Global temperature|Low-rank approximation|Non-stationary spatial structure|Tukey g-and-h transformation|
Sponsors:
Section on Statistics and the Environment
Tracks:
Spatio-temporal statistics
Can this be considered for alternate subtype?
No
Are you interested in volunteering to serve as a session chair?
No
I have read and understand that JSM participants must abide by the Participant Guidelines.
Yes
I understand that JSM participants must register and pay the appropriate registration fee by June 1, 2024. The registration fee is non-refundable.
I understand